Any combining, mixing, adding, diluting, exploiting, vulgarizing, or popularizing of abstract art deprives art of its essence and depraves the artist's artistic consciousness. Art is free, but it is not a free-for-all. The one struggle in art is the struggle of artists against artists, of artist against artist, of the artist-as-artist within and against the artist-as- man, -animal, or -vegetable. Artists who claim their artwork comes from nature, life, reality, earth or heaven, as 'mirrors of the soul' or 'reflections of conditions' or 'instruments of the universe', who cook up 'new images of man' - figures and 'nature-in-abstraction' - pictures, are subjectively and objectively, rascals or rustics.

Donald Judd, in: American Dialog, Vol. 1-5, (1964), p. ix